C-class cruiser - Wikipedia
The C class was a group of twenty-eight light cruisers of the Royal Navy, and were built in a sequence of seven groups known as the Caroline class (six ships), the Calliope class (two ships), the Cambrian class (four ships), the Centaur class (two ships), the Caledon class (four ships), the Ceres class (five ships) and the Carlisle class (five ...

Vehicle size class - Wikipedia
Vehicle size classes are a way of classifying cars. The common North American parlance is word-based, while English-speaking European writers also use words to describe car sizes.